# WP 34s vs ModelWitch

The clearest difference is in-app purchases: WP 34s at none against ModelWitch's 3. WP 34s also leads on iOS requirement (12.0 vs 17.0). ModelWitch's advantage is update cadence (every 4 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. ModelWitch sells 3 in-app purchases, starting at $2.99 per month. WP 34s asks for nothing beyond the download.

WP 34s ships an update every 4 months, ModelWitch every 4 days. The most recent releases landed on September 20, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | WP 34s | ModelWitch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (28 ratings)](https://appshunter.io/ios/app/wp-34s/id620255094/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 92.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 11 MB | 9 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Pascal Meheut](https://appshunter.io/developer/620255097) | [Lumenif OÜ](https://appshunter.io/developer/1846205412) |

## What reviewers say

### WP 34s

[App page](https://appshunter.io/ios/app/wp-34s/id620255094)

This app is a powerful RPN scientific calculator with extensive functions for mathematics, statistics, programming, and engineering. It includes programmer functions, fraction mode, probability distributions, and a stopwatch, offering a comprehensive tool for complex calculations.

**Highlights:** RPN scientific calculator implementation, Programmer functions (binary, octal, hexadecimal), Fraction mode and probability distributions, Stopwatch with real-time clock, Mathematical, statistical, and financial functions, Unit conversions and physical constants, Extended character sets for multiple languages

**Features:** macOS Compatibility

**In-app purchases:** none


### ModelWitch

[App page](https://appshunter.io/ios/app/modelwitch/id6778496717)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ModelWitch Premium — Monthly | $2.99 | per month |
| ModelWitch Premium — Yearly | $19.99 | per year |
| ModelWitch Premium — Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is WP 34s free?

WP 34s is free to download, with no in-app purchases.

### Is ModelWitch free?

ModelWitch is free to download, with in-app purchases available.

### Do WP 34s or ModelWitch have ads?

Neither WP 34s nor ModelWitch shows ads.

### Which is updated more often, WP 34s or ModelWitch?

WP 34s ships an update every 4 months, and ModelWitch every 4 days. Most recently, WP 34s was updated on September 20, 2026 and ModelWitch on September 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*